The Speed 2 by Nathan Sports is a an ideal, gel waist pack for long runs on the road or trail, especially those runs where water is available. Made with a molded holster that holds two, 10 oz nutrition flasks for quick Flask access and is equipped with an Airmesh moisture wicking backing that keeps sweat from forming up on your waist causing chafing and irritation. The limited stretch elasticized waistbelt has a soft perimeter binding for absolute comfort.